Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c10b5881f1cf2b…

MALICIOUS

PDF

70.4 KB Created: 2021-01-21 04:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: da10a64d71ad940af5a8f57f8f42a64a SHA-1: 075bb59197876a8e4e91eee523bed5ff3d0d968c SHA-256: a5c10b5881f1cf2b57282f96ce1e5c9a68065e3cb37a722189074c4e5653f3a0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to reference song lyrics, likely as a lure to disguise the malicious intent of directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jacksth.ru/123?utm_term=take+me+for+granted+lyrics PDF link annotation
    • https://buroxaserojer.weebly.com/uploads/1/3/1/0/131070485/6e0dd8.pdfIn PDF document text
    • https://site-1175442.mozfiles.com/files/1175442/43334606184.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/hdWijcI/gorazofolerapixe.pdfIn PDF document text
    • https://bigimenuxorotel.weebly.com/uploads/1/3/4/6/134655509/bomegobav_bapiniguref.pdfIn PDF document text
    • https://site-1172238.mozfiles.com/files/1172238/screen_time_iphone.pdfIn PDF document text
    • https://site-1174611.mozfiles.com/files/1174611/xifasewotugarinado.pdfIn PDF document text
    • https://kevosenebiv.weebly.com/uploads/1/3/1/8/131871602/43892e33f19a.pdfIn PDF document text
    • https://wavoxodasamemat.weebly.com/uploads/1/3/5/3/135348105/c972ea0c9.pdfIn PDF document text
    • https://site-1217744.mozfiles.com/files/1217744/24122542045.pdfIn PDF document text
    • https://site-1184900.mozfiles.com/files/1184900/wwe_united_kingdom_championship_tournament_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gonima/boundaries_2018_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/49630463505.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C8 5456 bytes
SHA-256: eadbc00de8df9aa775c7725735643e42531ed0e01069e813405d54faa04ecc3e
font_01_sfnt_off0000e851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE851 10864 bytes
SHA-256: 8be5237f0777c04d4cd84210877ed28fec2442e6d5442d16095194fbfccb6278

Open this report in the interactive analyzer, or submit your own file for analysis.